Travelling at speeds close to that of light, spacemen lived at an accelerated pace. When one of the twin boys left the starship, he grew older while his twin in space barely aged. So the starship twin left the ship to find what happened to his brother who was aging away on earth.

Here are two early stories by the well known SF Author Robert Silverberg. The Happy Unfortunate was published first in Amazing Stories in 1957 and explores the angst caused when the human race reaches into space but at the cost of needing to breed a new species; specialized 'spacers' who can withstand the tremendous rigors of acceleration. The Hunted Heroes was published in Amazing stories a year earlier, in 1956. It is a futuristic story that holds great hope for the resilience of the human race after the war destroys most of the world.

Why did everybody step off the ship in this strange valley and promptly drop dead? How could a well-equipped corps of tough spacemen become a field of rotting skeletons in this quiet world of peace and contentment? It was a mystery Peter and Sherri had to solve. If they could live long enough! [from the Judas Valley]Originally published in Amazing Stories, October 1956

Of all the natural sciences there is not one which offers such sublime objects to the attention of the inquirer as does the science of astronomy. From the earliest ages the study of the stars has exercised the same fascination as it possesses at the present day. Among the most primitive peoples, the movements of the sun, the moon, and the stars commanded attention from their supposed influence on human affairs. From the days of Hipparchus down to the present hour the science of astronomy has steadily grown...

Robert Sterling Yard (February 1, 1861 – May 17, 1945) was an American writer, journalist, and wilderness activist. Born in Haverstraw, New York, Yard graduated from Princeton University and spent the first twenty years of his career in the editing and publishing business. In 1915, he was recruited by his friend Stephen Mather to help publicize the need for an independent national park agency. Their numerous publications were part of a movement that resulted in legislative support for a National Park Service (NPS) in 1916...

How do you tell apart a parrot from a carrot? A plover from a clover? A bay from a jay? Although there are several ways of differentiating, R. W. Wood’s use of pun and rhyme is one of the most entertaining!

Roger North, son of Dudley North, 4th Baron North, was a successful member of the bar and later member of parliament. But he had wide ranging interests from architecture to music. He has an avid collector of books and is best known as the biographer of the North family. Here we sample his interest in raising fish. He presents fifteen short sketches of esculent fish, and a longer essay as "A Discourse of Fish and Fish Ponds." - Summary by Larry Wilson

Though little is known about its author, this is considered the first vegan cookbook ever written. At the time of its composition, the Vegetarian Society and other advocates of vegetarian diets were engaged in a debate about the inclusion of dairy and eggs in one's regime. This text declares, from the title to the footnotes, that the best diet is free from all animal products. The arguments span historical, physical, ethical, aesthetic, and economic considerations and conclude with practical advice that stands the test of time. An essential text for those interested in vegetarianism and animal rights.

Doubleday chronicles the history of everyday inventions that form the foundation of technology now common through the world. While some of the inventions are no longer used, each example shows how inventors contributed to technology through perseverance, inspiration and clever observations. In each chapter, he gives a clear, understandable background of the technology.Many of the now outdated inventions may have inspired later inventions by meeting emerging demands. For example, Edison's filament bulb is now being phased out by more efficient CFL's, but Edison's contribution to indoor lighting likewise removed the need for inefficient gas-burning lamps...

The author provides the listener with anecdotes from her life of her experiences with birds. She describes their habits and antics, their food favorites, their preferred nesting practices, and what can be done to encourage birds to become "neighbors". She also provides instructions on making a birdhouse.